"""
集合  a = {1，2，3}
列表  a = [1,2,3]
元组  a = ('1','2','3')
"""
set1 = {1, 2, 3, 4, 5, 6}
print(type(set1))
for set in set1:
    print(set)
# 如果是一个空的大括号就不是集合  就是一个字典
set2 = {}
print(type(set2))

# 集合天生去重
set3 = {1,2,3,4,5,1,1,2,3,1}
print(set3)